Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6253927 | Roller screen | Eero Väänänen, Martti Jankkila, Pekka Rantala | 2001-07-03 |
| 6197249 | Apparatus for conducting gas through material to be sintered | Eero Väänänen | 2001-03-06 |
| 4708640 | Apparatus for batch preparation and feeding into the smelting process | Matti E. Honkaniemi, Martti Jankkila, Pentti O. Hokkanen, Risto M. Heikkila, Launo L. Lilja | 1987-11-24 |
| 4705474 | Method and apparatus for batch preparation and feeding into the smelting process | Matti E. Honkaniemi, Martti Jankkila, Pentti O. Hokkanen, Risto M. Heikkila, Launo L. Lilja | 1987-11-10 |
| 4424959 | Brickwork construction | Frans H. Tuovinen, Pentti O. Hokkanen, Aimo Nurminen, Matti Virta | 1984-01-10 |